public class test1 {
    public boolean lemonadeChange(int[] bills) {
        int five = 0,ten = 0;
        for(int x:bills){
            if(x == 5)
                five++;
            else if (x==10) {
                if(five==0)
                    return false;
                five--;
                ten++;
            }
            else {
                if(five!=0&&ten!=0){
                    five--;
                    ten--;
                } else if (five>=3) {
                    five-=3;
                }
                else
                    return false;
            }
        }
        return true;
    }
}
